Building construction.



ALI.

W. B.` FEATHERSTONE.

BUILDING CONSTRUCTION. APPLICATION FILED JULY2, 1909.

1,109,214. l Patented sept.1,1914

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mun mill'" WILT-ARD IB. FEATHERSTONE, 0F WASHINGTON, DISTRICT 0F COLUMBIA.

BUILDING CONSTRUCTIONQ Specification of Letters Patent.

Patented sept. 1, 1914.

Application iled July 2, 1909. Serial No. 505,696.

To all whom t may concern:

Be it known that I, WILLARD B. FEATHER- STONE, a citizen of the United States, residing at Washington, in the District of Columbia, have invented certain new and useanother beam and two columns in section.

Fig. 2 is a perspective view of the beam shown in Fig. 1. Fig. 3 is part of an elevation of a building. Fig. 4 is a horizontal section threqugh pilasters and curtain-wall. Fig. 5 is a vertical section at z z, Fig. 6., Figs. 6 and 7 show longitudinal sections of beams. Fig. 8 shows a beam divided lengthwise. Fig. 9 shows a curtain-wall slab with sill attached. Fig. l0' shows a method of attaching a base-capital at thejunction of column and beam.

In. the drawings, A1 and A2, Fig. 3, are hollow columns supporting the hollow beam shells C1, C2, etc. These in turn support the columns A7 and A8, all of which column and beam shells are suitably reinforced and afterward filled with concrete.

In constructing a building, the column shells A1 and A2 are set in position onthe footings with the curtain-wall slab vB between them. They are then partly filled with concrete and the beam shells C1, C2, etc.,

hoisted into position. Additional reinforcement is now placed over thel column from beam to beam, and bars H, Fig. 3 inserted in the concrete in the lower column and eX- tending into the hollow space in the upper column A7. 'Ihe combined base-capital K, Fig. 3, is then placed in position and anchored as shown in Fig. 10.

Fig. l shows an improved form of remforcement, and also bracing for the column shells A and A5, and the beam shells C3 and C4.

Figs. 2, 5, 6, 7 and 8 show other viewsand -modifications of the beam shell C8. The concrete ribs or braces P, Figsl, 5, 6, 7 and 8 serve to stifen the shells during handling and also to increase the bond between the old and new concrete. The reinforcing bars T, Figs.'3, 5, 6, 7 and 10 are anchored in the beam shells C5, C,-etc., but are so disposed that the fresh concrete can surround portions of them. The wire netting or other minor reinforcement as R, Figs. 5, 6 and 7 is contained within the substance of the shell itself to stiffen its thinner portions.l

In Fig.`4 is shown a method of joining the curtain-wall slabs B and b to the'pilas-v ters A2 and A6, fresh concrete Vbeing poured in at N and VN1 after the projections N2 have been inserted in the grooves N3.

Fig. 8 shows a horizontal member or beamshell divided lengthwise to save weightand to facilitate handling.

In Fig. 9 the curtain-wall'slab B', which has been molded in one piece with the sill B., is reinforced with the wire netting B. It and stiiiened by the ribs P.

- It will beseen that by my new method of building construction it is possible to do away entirely with wooden or metal forms,

thus saving a great deal of time and expense. j

It is not necessary however, to have these tubular parts or shells made of Portland cement concrete with the customary aggregates, as any material which will adhere to the fresh concrete and can be conveniently made and shipped in the necessary lengths and sizes, is suitable for the purpose and sometimes more desirable, as a greater vari- ,ety of surface finishes can be provided.

I claim:

1. A building having its framework constructed of preformed concrete shells each comprising a mold substantially equal in lenofth to the beam or column of which it 'forms a part, transverse projections on the inner surfaces of the shells, longitudinal reinforcements partially embedded by the projections and extending beyond the ends of the shells, for the purpose of bonding or tying the adjoiningbeams or columns, and

concrete filling the shells and embedding the I remainder of the reinforcements.

` 2. A structural unit composed of apreformed concrete shell comprising a mold substantially equal in length to the unit of which it forms a part, and having transverse interior projections, longitudinal reinforcements passing through and partially embeddedby the projections, and extending beyond the ends of the shell for the purpose of facilitating union with like units or shells, and concrete lling the shell and embedding the remainder of the reinforcements.

3. A girder composed of a preformed concrete shell of approximately U-shaped section and substantially equal in length to the grdcr, and having transverse ribs P, reinforcing rods or the like T, CR, passing through the ribs and extending beyond the elrlwlls1 of the shell, and concrete filling the s e 4. A girder form comprising a one-piece lconcrete shell of approXimatel section, and substantially equal 1n length to` the length of a girder unit, projections, P, P,

U-shaped on the inner surface of the shell, reinforcevments partiallyv embedded in the projections and extending beyond the ends of the shell.

WILLARD B. FEATHERSTONE.

Witnesses F. L. STEFFEN, J os. N. LITTLE. 

